From TPM Reader KB ...

I feel pretty confident predicting that Bob Scheiffer will be a bigger obstacle for Obama tonight than McCain. It feels as if every beltway McCain fan boy has emailed the old newsman to beg him to bring up uncomfortable "issues." Expect Ayers, Wright, abortion, Cuba, taxes, race, clinging to guns, crime, welfare, deficit. The entire Dan Balz theory of "challenging Obama one last time."

Worth reviewing Schieffer's earlier tire-swinging ...